Multi-part intraocular lens with locking mechanism
AssigneeAlcon Inc.
InventorsKamal K. Das, William Jacob Spenner Dolla
Life of this patent
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Abstract
A multi-part intraocular lens (IOL) with an interchangeable optic seated on a base and secured by a locking mechanism. The optic comprises an anterior surface with a diameter greater than a diameter of a ring of the base. The posterior side of the optic has a posterior surface, a transition region for contact with the base, and sidewalls and tabs radially outward of the transition region. The sidewalls and tabs overlap at least a portion of the ring to reduce or even prevent decentration and tilt of the optic. Each tab has a lateral extension for coupling to the base.
Claims20
An intraocular lens assembly, comprising:
- a base comprising:
- a ring comprising:
- an anterior surface and a posterior surface defining a ring thickness;
- an outer surface defining a ring diameter;
- and
- a pair of haptics extending from the outer surface of the ring, each haptic comprising a gusset region, an elbow region and a distal region, wherein an inner surface of the gusset region and the outer surface of the ring form a ring-haptic junction;
- and
- an optic comprising:
- an anterior side with an anterior surface defining an anterior surface diameter greater than the ring diameter;
- a posterior side comprising:
- a posterior surface;
- a transition region radially outward of the posterior surface;
- a pair of sidewalls located radially outward of the transition region, wherein each sidewall has a sidewall height;
- and
- a pair of tabs located radially outward of the transition region, wherein:
- each tab defines a tab height;
- each tab comprises a lateral extension;
- and
- a tab positions the lateral extension posterior to a posterior surface of a haptic of the pair of haptics when the tab is positioned in the ring-haptic junction.
An intraocular lens (IOL) assembly, comprising:
- a base comprising:
- a ring comprising:
- an anterior surface and a posterior surface defining a ring thickness;
- an outer surface defining a ring diameter;
- and
- a pair of posts extending radially from the ring;
- an optic comprising:
- an anterior side with an anterior surface defining an anterior surface diameter greater than the ring diameter;
- a posterior side comprising:
- a posterior surface with a posterior surface radius of curvature;
- a transition region radially outward of the posterior surface;
- a pair of sidewalls located radially outward of the transition region, wherein each sidewall has a sidewall height;
- and
- a pair of tabs extending in a posterior direction, wherein:
- each tab defines a tab height;
- each tab comprises a lateral extension;
- and
- the pair of tabs position the lateral extensions posterior to the pair of posts when the optic is seated on the base.
A method for assembling an intraocular lens (IOL) comprising an optic and a base, the base comprising a ring having an anterior surface and a posterior surface defining a ring thickness, an outer surface defining a ring diameter, and a pair of haptics extending from the outer surface, the method comprising:
- positioning the optic on the ring, comprising:
- positioning a posterior side of the optic in contact with the anterior surface of the ring, wherein the optic comprises a pair of sidewalls radially outward of the outer surface of the ring, wherein each sidewall has a sidewall height configured to overlap at least a portion of the ring when the optic is seated on the ring;
- positioning each tab of a pair of tabs on the optic relative to a ring-haptic junction in the base, wherein:
- each haptic comprises a gusset region, an elbow region and a distal region,
- an inner surface of the gusset region and the outer surface of the ring form the ring-haptic junction,
- each tab defines a tab height;
- each tab comprises a lateral extension;
- and
- each tab positions the lateral extension posterior to a posterior surface of a haptic of the pair of haptics when the tab is positioned in the ring-haptic junction;
- and
- rotating the optic relative to the base to position the lateral extension proximate to the posterior surface of a haptic of the pair of haptics.
Dependencies are inferred from the claim text.